Check-valve structure.



P. w. HENNESSY.

CHECK VALVE STRUCTURE. APPLICATION man DEc.2a.1914.

1,170,813, E l Ptented Feb.8 1 916.

lmnnnuur .H I

y y atroz/14613 PATRICK w. HnNNnssY, or JorLIN, MISSOURI.

CHECK-verve STRUCTURE.

To all whom t may concern.' Y

Be it known that I, PATRICK TV. HEN- v NnssY, a citizen of theUnited States, residing at Joplin, inthe county of Jasper and State of Missouri, have invented certain new and useful Improvements iny Check-Valve Structures, of which the following is a specification. Y

My invention relates to improvements in checlnvalves. f

An important object of the invention is to provide simple nad reliable means, operatable from the exterior of the check-valve casing, and adapted when operated to unseat theA check-valve if the same shouldstick, but not impairing the automatic operation of the check-valve. i

Other objects and advantages of the invention will be apparent during the course of the follo-wing description.

In the accompanying drawings forming a part of this specification and in which likel numerals are employed to designate like parts throughout the same, Figure 1 is a v central vertical longitudinal Vsectional view of a. check-valve Vembodying my invention, Fig. 2 is a plan view of a spider-guide, and, Fig. 3 is a sectional view taken on line 3-43 of Fig. 2. Y

In the drawings, wherein for thepurpose of illustration is shown a preferred embodiment of my invention, the numeral 5 designates the improved valve structure as a whole, comprising upper and lower casing sections 6 and 7, having their engaging ends provided with flanges 8, secured to-gether by bolts 9, as shown. These flanges are preferably provided with grooves 10, in registration with each other, and receiving packing 11, as shown.

Arranged within the upper portion of the lower casing section 7 is a preferably annular valve-seat 12, having a lower beveled or curved wall 13, flush with the inner surface of the casing section 7 and forming in effect, a continuation thereof. The finner surface of the casing'section 7 is curved to offer the least resistance to the incoming liquid. The annular valve-seat 12 is provided with an upper beveled or inclined face 14, engaged and disengaged by the beveled edge of a vertically movable checkvalve 15, arranged above the same. This check-valve is rigidly secured to a rod or shaft 16, the lower portion of which is Speccation of Letters llatent. i Patgniggd Fela- 8, L1916i,

Application led December 28, 1914. Serial No; 879,360. i

-mounted to reciprocate within a sleeve 17,

12 preferably has screw-threaded engage-A ment with the casing section 7 as shown.v

Arranged within the upper casing section 6 is a spider-guide 19 embodying an outer ring 20, having upper and lower beveled faces 21 and 22, flush with the curved inner surfaces of the casing section 6, forming inv effect al continuation thereof, as shown. This ring 2O preferably has screw-threaded engagement with they casing section 6, as shown. Carried by the ring 2() are arms 23 and 241, carrying a sleeve25, receiving the upper end of the shaft 16, rand adapted tojengage with a stop 26, secured to the shaft above and acent the check-valve 15, .as-shown. The arm 24` is providedwitha longitudinal slot 27 and carries spaced up'- standing ears 28, :apertured for the vreception of a transverse rock-shaft 29, having a lifting dog 30, rigidly secured thereto. This lifting-dog is arranged between the ears 28, with 'its nose disposed below a nut 31, preferably having screw-threaded engagement with the shaft 16 to be longitudinally adjustable thereon. It is obvious that when the shaft 29 is turned in the proper direction, the dog 30 will engage with the nut 31 to move the same upwardly, to elevate the shaft 16 and its check-valve 15'.

The shaft 29 is `iournaled through a stuing box 82, arranged upon the exterior of the casing section 6, and has a crank 33 rigidly secured to the outer end thereof, by means of which the rock-shaft is turned. This crank may be moved and held inthe desired position, by any suitable means.v

v In operation, the rock-shaft 29 is normally held in a position whereby the dog 80 is moved out of engagement with the nut sticking to its seat. This causes consider;y

able inconvienence and it is sometimes impossible to get a check-valve to operate after Y with the lo-wer side of the nut 31, whereby the check-valve is lifted from its seat.

It is to be understood that the form of invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the sub- `joined claims.

Having thus described the invention, I claim Y l. In a valve structure, a pair of casing sections arranged in end to end relation and suitably connected, a valve seat having'its opposite sides beveled and having screwthreaded engagement with one casing section, a spider connected with and depending from the valve seat, a reciprocatory valve stem slidably engaging the spider to be guided thereby, a gravity operated valve connected with the valve stem and disposed above the valve seat to engage therewith, a support ring having screw-threaded engagement with the other casing section above the valveseat and having oppositely arranged bevel faces, an apertured guide arm carried by the support ring and receiving the upper end of the valve stem in the aperture and having spaced upstanding ears projecting above it for a substantial distance, a member carried by the upper end of the valve stem, a lift dog arranged between thel and having screw-threaded engagement with the upper portion of the valve casing section ,and provided with upper and lower beveled faces, 'an apertured spider carried by the valve seat and depending therefrom, a substantially vertical valve stem having its lower end operating within the aperture of the spider, a gravity operated check-valve rigidly secured to the valve stem above the valve seat to engage and disengage theupper beveled face thereof, an upper casing section having its lower end engaging the upper end of the lower casing section, a support ring disposed within and having screw-threaded engagement with the lower end of the upper casing section and having upper and lower beveled faces, a substan tially horizontal guide arm carried by and extending diametricaily of the support ring and provided with a central aperture to receive the valve stem and spaced lears arranged upon one side of the aperture, a substantially horizontal rock-shaft eXtending through one side of the upper casing section and journaled through the spaced ears, a lift dog rigidly secured to the end of the rock-shaft and arranged between the spaced ears, and a nut having screw-threaded engagement with the upper end of the valve stem and disposed above the lift dog.

In testimony whereof I affix my signature in presence of two witnesses.

PATRICK IV. HENNESSY. Witnesses:

B. B. MGHAN, W. J. OWEN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner vof Patents,

' Washington, D. C. 

